236 PROCEEDINGS OP THE AMERICAN ACADEMY 



XVI. 



THE TROPICAL EAUNAL ELEMENT OE OUR SOUTH- 

 ERN NYMPHALLNLE SYSTEMATICALLY TREATED. 



By Samuel H. Scudder. 



Presented November 9, 1892. 



It is not a little remarkable that, with the exception of Hypan- 

 artia (Vanessini) and Diadema (Argynnini), all those genera of the 

 subfamily Nymphalinse which are essentially tropical or subtropical, 

 and are represented on the extreme southern border of the United 

 States by a very few species each, (species which in many cases 

 must be looked upon as more or less accidental visitors,) belong to 

 a few tribes which directly follow one another between the Nym- 

 phalini and Vanessini. Nevertheless they show a great diversity 

 of forms, and since in the systematic arrangements heretofore given 

 they have not been so closely connected as they are here conceded 

 to be, I have thought it well to give the following succinct treat- 

 ment of them, originally planned for a Manual of our Butterflies. 

 The account of the early stages is very largely drawn from Wilhelm 

 Midler's " Siidamerikanische Nymphalidenraupen," but this has 

 been supplemented from various sources. 



Tribe VICTORINIINI. 



Butterfly : Antennae very slender, the club moderately stout, 

 rather short and rather rapidly incrassated, laterally tricarinate 

 beneath except at extreme tip. Palpi compact, slender, tapering 

 greatly, the last joint of considerable length. Wings broad with a 

 feeble angle at the first inferior subcostal nervule of fore wings, 

 the hind wings crenate with a distinct lobe at the upper median 

 nervule; cell of both wings open. Last tarsal joint with two rows 

 of spines beneath. Egg : Subcorneal, provided with few (9-11) 

 and rather prominent ribs, which increase slightly in height to- 

 ward but not reaching the pole. Caterpillar at birth : Head 

 rounded, covered with simple bristles. Trichomes of body bristle- 



